Liquid crystal display having high aperture ratio and high transmittance

Abstract

Disclosed is a liquid crystal display having high aperture ratio and high transmittance comprising: first and second transparent insulating substrates opposed with intervening a liquid crystal layer; gate bus lines and data bus lines arranged cross to each other on the first transparent insulating substrate so as to define pixel regions; a counter electrode disposed within each pixel region, made of a transparent conductive material, and having a plurality of first branches disposed parallel with the data bus lines with equal distance and a bar connecting one ends of the first branches; a common signal line applying a common signal to the counter electrode disposed within each pixel region, contacted with the bar of the counter electrode, disposed parallel with the gate bus line, and having a pair of second branches branched toward the data bus line and disposed between the data bus line and the first branches of both edges of the counter electrode; a pixel electrode disposed within each pixel region to generate a fringe field together with the counter electrode, made of a transparent conductive material, and having a plurality of third branches disposed parallel to the data bus line with equal distance, a first bar connecting one ends of the third branches, a second bar connecting the other ends of the third branches; and a black matrix disposed at a portion of the second transparent insulating substrate corresponding to the gate bus line, the data bus line and the common signal line, wherein width of the black matrix at the portion corresponding to the common signal line is narrower than that of the common signal line.

What is claimed is:  
     
       1. A liquid crystal display having high aperture ratio and high transmittance comprising: 
       first and second transparent insulating substrates opposed with intervening a liquid crystal layer;  
       gate bus lines and data bus lines arranged cross to each other on the first transparent insulating substrate so as to define pixel regions;  
       a counter electrode disposed within each pixel region, made of a transparent conductive material, and having a plurality of first branches disposed parallel with the data bus lines with equal distance and a bar connecting one ends of the first branches;  
       a common signal line applying a common signal to the counter electrode disposed within each pixel region, contacted with the bar of the counter electrode, disposed parallel with the gate bus line, and having a pair of second branches branched toward the data bus line and disposed between the data bus line and the first branches of both edges of the counter electrode;  
       a pixel electrode disposed within each pixel region to generate a fringe field together with the counter electrode, made of a transparent conductive material, and having a plurality of third branches disposed parallel to the data bus line with equal distance, a first bar connecting one ends of the third branches, a second bar connecting the other ends of the third branches; and  
       a black matrix disposed at a portion of the second transparent insulating substrate corresponding to the gate bus line, the data bus line and the common signal line, wherein width of the black matrix at the portion corresponding to the common signal line is narrower than that of the common signal line.  
     
     
       2. The liquid crystal display having high aperture ratio and high transmittance of  claim 1 , wherein width of the common signal line is 33˜35 μm, and width of the black matrix portion corresponding to the common signal line is 16˜18 μm when a unit pixel region is 110×330 μm.